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1; NOTE: Assertions have been autogenerated by utils/update_test_checks.py2; RUN: opt -passes=newgvn -S %s | FileCheck %s3 4; Test cases to make sure the blocks are properly marked as executable, if the5; state of the branch condition changes.6 7; Test case to make sure the case where a condition cannot be simplified is8; handled properly.9define i1 @test1() {10; CHECK-LABEL: @test1(11; CHECK-NEXT: entry:12; CHECK-NEXT: [[CALL:%.*]] = tail call i1 @foo()13; CHECK-NEXT: br i1 [[CALL]], label [[THEN:%.*]], label [[ELSE:%.*]]14; CHECK: then:15; CHECK-NEXT: ret i1 true16; CHECK: else:17; CHECK-NEXT: ret i1 false18;19entry:20 %call = tail call i1 @foo()21 br i1 %call, label %then, label %else22 23then:24 ret i1 true25 26else:27 ret i1 false28}29 30declare i1 @foo()31 32; Make sure state changes are propagated across freeze to branches.33define void @test2(i1 %c) {34; CHECK-LABEL: @test2(35; CHECK-NEXT: entry:36; CHECK-NEXT: br label [[LOOP_HEADER:%.*]]37; CHECK: loop.header:38; CHECK-NEXT: [[P_0:%.*]] = phi i32 [ 0, [[ENTRY:%.*]] ], [ [[INC:%.*]], [[LOOP_LATCH:%.*]] ]39; CHECK-NEXT: [[P_1:%.*]] = phi i32 [ 1, [[ENTRY]] ], [ [[P_2:%.*]], [[LOOP_LATCH]] ]40; CHECK-NEXT: br label [[LOOP_BB_1:%.*]]41; CHECK: loop.bb.1:42; CHECK-NEXT: [[INC]] = add nsw i32 [[P_0]], 143; CHECK-NEXT: [[C_1:%.*]] = icmp slt i32 [[P_0]], 044; CHECK-NEXT: [[C_1_FREEZE:%.*]] = freeze i1 [[C_1]]45; CHECK-NEXT: br i1 [[C_1_FREEZE]], label [[LOOP_BB_2:%.*]], label [[LOOP_LATCH]]46; CHECK: loop.bb.2:47; CHECK-NEXT: br label [[LOOP_LATCH]]48; CHECK: loop.latch:49; CHECK-NEXT: [[P_2]] = phi i32 [ 0, [[LOOP_BB_2]] ], [ [[P_1]], [[LOOP_BB_1]] ]50; CHECK-NEXT: [[C_2:%.*]] = icmp eq i32 [[P_2]], 12351; CHECK-NEXT: br i1 [[C_2]], label [[EXIT:%.*]], label [[LOOP_HEADER]]52; CHECK: exit:53; CHECK-NEXT: ret void54;55entry:56 br label %loop.header57 58loop.header:59 %p.0 = phi i32 [ 0, %entry ], [ %p.3, %loop.latch ]60 %p.1 = phi i32 [ 1, %entry ], [ %p.2, %loop.latch ]61 br label %loop.bb.162 63loop.bb.1:64 %inc = add nsw i32 %p.0, 165 %c.1 = icmp slt i32 %p.0, 066 %c.1.freeze = freeze i1 %c.167 br i1 %c.1.freeze, label %loop.bb.2, label %loop.latch68 69loop.bb.2:70 br label %loop.latch71 72loop.latch:73 %p.2 = phi i32 [ 0, %loop.bb.2 ], [ %p.1, %loop.bb.1 ]74 %p.3 = phi i32 [ %inc, %loop.bb.2 ], [ %inc, %loop.bb.1 ]75 %c.2 = icmp eq i32 %p.2, 12376 br i1 %c.2, label %exit, label %loop.header77 78exit:79 ret void80}81